Electrochemistry

For \(\mathrm{C{r_2}O_7^{2 - } + 14{H^ + } + 6{e^ - }\buildrel {Yields} \over \longrightarrow 2C{r^{3 + }} + 7{H_2}O,{E^\Upsilon } = 1.33}\) V at \([C{r_2}O_7^{2 - }] = 4.5\) millimole, \([C{r^{3 + }}] = 1.5\) millimole and \(E = 1.067\) V, then calculate the pH of the solution.